Hipsters revived the use of Polaroid instant cameras as a trendy retro fad, because they liked the signature highly-saturated colors of the photos.
Hipster programmers invented Instagram, which filters digital photos in various ways, including a filter that makes digital photos look color-saturated with softer definition.
The First Lady has this photo on her Instagram account, which has that Polaroidized look to it that is favored among hipsters.
Thanks wideawake-—makes sense and I can see how that fits the photo.